The patch titled
Subject: x86/kexec: simplify the logic of mem_region_callback()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
x86-kexec-simplify-the-logic-of-mem_region_callback.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-kexec-simplify-the-logic-of-mem_region_callback.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yuntao Wang <ytcoode@xxxxxxxxx>
Subject: x86/kexec: simplify the logic of mem_region_callback()
Date: Tue, 12 Dec 2023 23:05:06 +0800
The expression `mstart + resource_size(res) - 1` is actually equivalent to
`res->end`, simplify the logic of this function to improve readability.
Link: https://lkml.kernel.org/r/20231212150506.31711-1-ytcoode@xxxxxxxxx
Signed-off-by: Yuntao Wang <ytcoode@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/machine_kexec_64.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/arch/x86/kernel/machine_kexec_64.c~x86-kexec-simplify-the-logic-of-mem_region_callback
+++ a/arch/x86/kernel/machine_kexec_64.c
@@ -42,12 +42,9 @@ struct init_pgtable_data {
static int mem_region_callback(struct resource *res, void *arg)
{
struct init_pgtable_data *data = arg;
- unsigned long mstart, mend;
- mstart = res->start;
- mend = mstart + resource_size(res) - 1;
-
- return kernel_ident_mapping_init(data->info, data->level4p, mstart, mend);
+ return kernel_ident_mapping_init(data->info, data->level4p,
+ res->start, res->end);
}
static int
_
Patches currently in -mm which might be from ytcoode@xxxxxxxxx are
crash_core-fix-the-check-for-whether-crashkernel-is-from-high-memory.patch
kexec-use-align-macro-instead-of-open-coding-it.patch
x86-kexec-simplify-the-logic-of-mem_region_callback.patch
